By G. S. V. Raghavan, P. Alvo, E. McKyes (auth.), R. Lal, B. A. Stewart (eds.)
The goal of Advances in Soil technological know-how is to supply a discussion board for major scientists to research and summarize the to be had clinical info on a subject matter, assessing its value and selecting extra learn wishes. a wide range of matters has been addressed by way of authors from many nations within the preliminary ten volumes of the sequence. the short reputation of the sequence by means of either authors and readers has been very satisfying and confirms our belief desire did exist for a medium to fill the space among the medical journals and the excellent reference books. This quantity is the 1st of the sequence dedicated completely to a unmarried subject soil degradation. destiny volumes will comprise either single-topic volumes in addition to volumes containing experiences of alternative themes of soil technological know-how, as relating to the 1st ten volumes. There are expanding problem and a focus approximately coping with usual re resources, rather soil and water. Soil degradation is obviously some of the most urgent difficulties dealing with mankind. even though the highlight relating to soil degradation lately has interested in Africa, situation in regards to the degradation of soil and water assets is all over the world. The frequent con cern approximately international environmental switch is usually being associated with serious difficulties of soil degradation. as a result, we're certainly happy that the 1st quantity of the sequence dedicated to a unmarried subject addresses such an impor tant factor. the present quantity can also be the 1st of the sequence concerning a visitor editor.
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Extra resources for Advances in Soil Science: Soil Degradation
Raghavan, P. Alvo, and E. McKyes o~---------- ________________-. INITIAL . ~, // ----...... .. . ~ ----\ \ -'. 1;-..... ~........ , b SANOY LOAM I CLAY ......... :,:... ". 1 1. 2 1. 4 1. 4 . oJ o ~"' IC...... 05 "'. ,:' '1 / ..... •. 2 1. 0 1. 3 (Mg/m') Figure 21. (a, b) Average dry bulk density profiles of sandy loam and clay plots, respectively: - - - , initial profile; - - - - , 1 pass; ----,5 passes; - - - , 15 passes. Contact pressure: 62 kPa. (c, d) Dry bulk density profiles of sandy loam and clay plots subjected to 15 passes with contact pressure of 62 kPa and subsequently loosened with: C, chisel; M, moldboard; S, subsoiler.
Implementation of strategies to control soil physical condition is possible but depends on cost-benefit evaluations, possible policy and market changes to ensure the economic feasibility of alleviating procedures and beneficial crop rotations, and the development of appropriate techniques Soil Compaction in Agriculture 31 Figure 25. Controlled traffic using twin steam engines on guideway system as conceived by Halkett in 1858. [From Partridge (1973); sketch by S. ] Figure 26. "Modern version": wide-frame vehicle used in controlled traffic re- search by USDA.
Theriault. 1985. A reivew of subsoil compaction. Int. Cant Soil Soil Dynamics Proc. 5: 970-978. V. Raghavan, E. McKyes, and R. Theriault. 1987a. Sub-soil compaction in a clay soil. I. Cumulative effects. Soil and Tillage Res. 10: 113122. V. Raghavan, E. McKyes, and R. Theriault, 1987b. Sub-soil compaction in a clay soil. II. Natural alleviation. Soil and Tillage Res. 10: 123130. R. 1971. Economic assessment of soil compaction. ASAE Monograph, St. Joseph, MI. Girt, J. 1986. The on-farm economics of sustainability and public intervention.